Alliance
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1.) Quest name: Dragonkin Menace
Start: Helendis Riverhorn
Location: Burning Steppes
Level: 54 elite
Notes: The NPC asks you to kill a number of different types of dragons in Burning Steppes. I did this at level 60 with a level 60 warrior and myself. If you do this at level 54, I would advise taking more than two people. Some of the dragons have rather high HP and do a pretty decent amount of damage.

2.) Quest Name: The True Masters
Start: Helendis Riverhorn
Location: Burning Steppes
Level: 54
Notes: The NPC asks you to deliver a letter to Magistrate Solomon in Lakeshire.

3.) Quest Name: The True Masters
Start: Magistrate Soloman
Location: Lakeshire Town Hall
Level: 54
Notes: You are asked to deliver another letter to Highlord Bolvar Fordragon in Stormwind Keep.

(Darkflame add: The True Masters -- Speak with Lady Prestor.

4.) Quest Name: The True Masters
Start: Highlord Bolvar Fordragon
Location: Stormwind Keep
Level: 54
Notes: You are asked to take another letter back to Magistrate Solomon in the Lakeshire Town Hall.

5.) Quest Name: The True Masters
Start: Magistrate Solomon
Location: Lakeshire Town Hall
Level: 54
Notes: Magistrate Solomon tells you to return to Morgan's Vigil in the Burning Steppes and to talk to Marshal Maxwell.

6.) Quest Name: The True Masters
Start: Marshal Maxwell
Location: Burning Steppes
Level: 54
Notes: Marshal Maxwell tells you to find and speak to someone named Ragged John in the Burning Steppes. He is located almost directly North of Morgan's Vigil near a cave at the top of the map.

7.) Quest Name: Marshal Windsor
Start: Ragged John
Location: Cave in Burning Steppes
Level: 54 elite
Notes: This is where things start to get harder. You can start this at level 54, but I would not advise it until closer to level 60. Take a full group. You will be heading into Blackrock Depths for this. Marshal Windsor is located in one of the cells towards the right side of the entrance to the instance.

8.) Quest Name: Abandoned Hope
Start: Marshal Windsor
Location: Blackrock Depths
Level: 54 elite
Notes: Again, take a full group of five. The more level 60's you have the easier this will be. Once you talk to Marshal Windsor, he tells you to leave him and talk to Marshal Maxwell again. So it's back to the Burning Steppes for you.

9.) Quest Name: A Crumpled Up Note
Start: Crumpled Up Note
Location: Blackrock Depths
Level: 54 elite
Notes: After you talk to Marshal Maxwell, the chain seems to end. You must go back to Blackrock depths and kill enemies until one of them drops the crumpled note. It is a random drop, but luckily does not seem to take long to get. When you do find it, you must take it to Marshal Windsor, who is still sitting in his jail cell in Blackrock Depths.

10.) Quest Name: A Shred of Hope
Start: Marshal Windsor
Location: Blackrock Depths
Level: 58 elite
Notes: Marshal Windsor asks you to find his lost information. There are two pieces, they are dropped by General Angerforge and Golem Lord Argelmach.

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Dragonkin Menace -> The True Masters (part 1, Redridge) -> The True Masters (part 2, SW) -> The True Masters (part 3, back to Redridge) -> The True Masters (part 4, back to Morgan's Vigil in Burning Steppes) -> talk to Ragged John -> talk to marshal Maxwell -> Marshall Windsor -> Abandoned Hope. Next step begins when you find a Crumpled Note off random drop in BRD. Take it back to Marshall Windsor and get A Shred of Hope -> Jail Break -> Stormwind Rendevous -> The Great Masquerade, and you then get the key to Onyxia's Lair!